final feasibility report on detailed hydrographic survey …
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STRABAG India Pvt Ltd, New Delhi
IWAI - NW-12, Assi River (Assi Ghat to Indira Nagar Colony) P a g e | 1
FINAL FEASIBILITY REPORT ON DETAILED HYDROGRAPHIC SURVEY
ASSI RIVER
FROM GANGA CONFLUENCE AT ASSI GHAT
(0.0 KM CH) TO NEWADA (5.50 KM CH)
NATIONAL WATERWAY NO- 12
VOLUME – I
Submitted To
INLAND WATERWAYS AUTHORITY OF INDIA A-13, Sector-1,NOIDA DIST-Gautam Buddha Nagar UTTAR PRADESH PIN- 201 301(UP) Email: [email protected] Web: www.iwai.nic.in
Submitted By
STRABAG INDIA PVT LTD. Southern Park, Unit No.6, 4th Floor D-2, DDA District Centre, Saket, New Delhi 110017 India Tel : 91-11 492 01 492 , 91-11 492 01 454 Fax : 91-11 -492 01 493 Email: [email protected] Web: www.strabagindia.com
Submitted On
/09/ 2018
STRABAG India Pvt Ltd, New Delhi
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ACKNOWLEDGEMENT
STRABAG India Pvt. Ltd. (SIPL) express their gratitude to Shri S. K. Gangwar,
Member (Technical) and Ms. Nutan Guha Biswas, IAS, Ex-Chairperson, IWAI for
providing us the opportunity for "Detailed Hydrographic and Topography Survey of
Assi River in Region VII of National waterways, a dream and very important part of
Nation Development”.
SIPL would also like to thanks Shri Pravir Pandey, IA & AS, Chairman, Shri Alok
Ranjan, ICAS, Member (Finance) and Shri Shashi Bhushan Shukla, Member
(Traffic).
SIPL wishes to express their gratitude to Capt. Ashish Arya, Hydrographic Chief
and Cdr. P.K. Srivastava, Ex Hydrographic Chief, IWAI for his guidance and
technical inputs in this project. SIPL would also like to thank Sh. Rajiv Singhal,
A.H.S., IWAI for his valuable support and suggestions provided through out the
survey period. SIPL is pleased to place on record their sincere thanks to other staff
and officers of IWAI and CWC Department.
STRABAG India Pvt Ltd, New Delhi
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CONTENTS
Section 1 Introductory Considerations ............................................................... 8
1.1 River Course ........................................................................................................ 8
1.2 Tributaries ............................................................................................................ 8
1.3 States & Districts .................................................................................................. 8
1.4 (a) Full Course of Waterway ................................................................................. 9
1.4 (b) Course of Waterway under study .................................................................. 10
1.5 Scope of Works .................................................................................................. 11
Section 2 Methodology Adopted to Undertake Study ...................................... 12
2.1 Methodology ....................................................................................................... 12
2.1(a) Personnel and Resources .............................................................................. 12
2.1(b) Equipment Used .......................................................................................... 12
2.1(c) Topographic Survey .................................................................................... 13
2.1(d) Calibration ...................................................................................................... 14
2.2 Description of Bench Mark ................................................................................. 14
2.3 Tidal Influence Zone and Tidal Variation ............................................................ 15
2.4 Methodology to Fix Sounding Datum ................................................................. 15
2.5 Maximum and Minimum Water Level ................................................................. 15
2.6 Salient Features of Dam, Barrages, Weirs, Anicuts, Locks & Aqueducts, etc .... 15
2.7 Description of Erected Bench Mark Pillars ......................................................... 16
2.8 Description of Erected Tide Gauges ................................................................... 16
2.9 Chart Datum/ Sounding Datum and Reduction Details ...................................... 17
2.10 HFL at Gauge Stations and Cross-Structures .................................................. 17
2.11 Graph: Sounding Datum and HFL vs Chainage ............................................... 18
2.12 Average Bed Slope .......................................................................................... 18
2.13 Details of Dam, Barrages, Weirs, Anicuts, etc .................................................. 19
2.14 Details of Locks ................................................................................................ 19
2.15 Details of Aqueducts ........................................................................................ 19
2.16 Details of Existing Bridges & Crossings ........................................................... 20
2.17 Details of Other Cross Structures ..................................................................... 20
2.18 High Tension Lines / Electric Lines / Tele-Communication Lines ..................... 20
2.19 Current Meter and Discharge Details ............................................................... 20
2.20(a) Water Samples & Water Samples ................................................................ 20
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Section 3 Description of Waterway .................................................................... 21
3.1 Sub-Stretch 1: From Ch 0 km to Ch 5.5 km ....................................................... 21
Section 4 Terminals ............................................................................................. 27
4.1 Terminals ........................................................................................................... 27
Section 5 Fairway Development ......................................................................... 28
5.1 Fairway Development ......................................................................................... 28
5.2 Calculation of Dredging Quantity ........................................................................ 29
Section 6 Conclusion .......................................................................................... 32
6.1 Conclusion ......................................................................................................... 32
List of Annexure
Annexure 1. Source & type of Data .......................................................................... 34
Annexure 2. Min/ Max Depth/ Length of Shoal .................................................... 35-36
Annexure 3. Details of Collected Water Level .......................................................... 37
Annexure 4. Details of Topographic Survey ............................................................. 38
Annexure 5. Details of Bank Protection along the Bank ........................................... 39
Annexure 6. Details of Features across the Bank ............................................... 40-41
Annexure 7. Detailed Methodology Adopted ....................................................... 42-43
Annexure 8. Photographs of Equipment .............................................................. 44-45
Annexure 9. Bench Marks ................................................................................... 46-47
Annexure 10. Levelling Calculations & Levelling Diagram .................................. 48-52
Annexure 11. Soil Sample ........................................................................................ 53
Annexure 12. Water Samples .................................................................................. 54
Annexure 13. Calibration Certificates .................................................................. 55-56
Annexure 14. Field Photographs ......................................................................... 57-60
Annexure 15. Survey Charts ............................................................................... 61-63
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List of Abbreviations
SD Sounding Datum
CD Chart Datum
RTK Real time Kinematic
DGPS Differential Global Positioning Systems
TS Total Station
GPS Global Positioning Systems
BM Bench Mark
MSL Mean Sea Level
RL Reference Level
HFL Highest Flood Level
HT High Tension Line
CH Chainage
WGS World Geodetic System
UTM Universal Transverse Mercator
LAD Least Available Depth
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SALIENT FEATURES AT A GLANCE
REGION-VII
Consultant: STRABAG INDIA PVT LTD.
Name ASSI River NW -12
Length 5.50 km from Ganga Confluence at Assi Ghat to Newada.
State Uttar Pradesh
Survey Period 08th Dec 2015 to 06th Jan 2016
Tidal / Non-tidal Non tidal
Availability of Depth (reduced) (mtrs)
(0-5.5) Km
<1.2 5.50
1.2-1.4 0.0
1.5-1.7 0.0
1.8-2 0.0
>2.0 0.0
TOTAL 5.50
Average Slope per KM(m) 2.602
Width Range (m) 5-10
Bathy Survey conducted for Length (Km)
Topo survey
Dredging Quantity (Observed) Cu.m
(0-5.50) Km
Class 1
1,82,361.75
Class 2
2,63,982.81
Class 3
3,76,236.75
Class 4
4,39,950.43
Dredging Quantity (Reduced) Cu.m
(0-5.50) Km
Class 1
2,10,793.00
Class 2
2,86,908.88
Class 3
3,86,322.36
Class 4
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4,50,280.25
No. of Bridge
02 Culvert
Clearances less than Class (no.)
Class Horizontal Vertical
Class 1 2 2
Class 2 2 2
Class 3 2 2
Class 4 2 2
No. of Dams, Barrages, Weirs, Anicut etc.
NA
Number of days Water not available
CWC Gauge No CWC gauge observed in the waterway.
Cargo availability
Nil
Passenger Movement
Nil
Present IWT use
Nil
Recommendation of the Consultant
1. The Assi is nala passing through the city carrying the waste. 2. The average width of the Assi river is 5.5 m, due to which it cannot be viable for any type of navigation.
Viable or not-viable
Not found technically viable as of now.
(Signature)
Date: __/____/ 2018 Name of Consultant
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SECTION – I: INTRODUCTORY CONSIDERATIONS
1.1 River Course. Inland Waterways Authority of India has awarded contract of
detailed Hydrographic Survey and feasibility report in Region VII, the National
Waterways including assessment of river training works and further development
cost, for eco-friendly navigations in the waterways, to Strabag India Pvt. Ltd. The
detailed topographic survey task was undertaken from Ganga confluence at Assi
Ghat (Lat25°17'18.64"N, Long 83° 0'25.46"E) to Newada (Lat 25°16'37.28"N,
Long82°58'17.60"E).
The river Assi is a minor tributary of the river Ganga and struggling for its existence.
The surveyed river stretch has been converted to Nala due to Illegal construction
works and encroachment on the whole river. The surveyed river length is now used
as a part drainage system of Varanasi city.
The total 5.5 km length of the river flows through the Varanasi city. Assi River is
carrying drainage & sewage waste to Ganga. Numerous narrow nallas are being
conjoined to Assi with untreated waste, for which the river is called as Assi Nala. The
6 to 10 meter wide river confluence at Assi Ghat, which has historical values. Assi
Ghat is the southernmost Ghat in Varanasi, where pilgrims bathe before paying their
homage to Lord Shiva in the form of huge lingam.
According to the ancient history, it is said that the Goddess Durga (consort of the
Lord Shiva) had thrown her sword in the river after killing the demon Shumbha-
Nishumbha. Assi Ghat is called as Assi Saimbeda Tirtha in Kashi Khand and is one
of the five special Ghats visited by pilgrims during the ritual route called Panchtirthi
Yatra. Thousands of Hindu pilgrims visit this place during the months of Chaitya
(March and April) and Magh (January and February).
1.2 Tributaries. No tributary was noticed in the surveyed river stretch.
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1.3 States & Districts. Assi River (Nala) originates from Newada, Varanasi
district, Uttar Pradesh. It runs through the city of Varanasi and confluences with
Ganga at Assi Ghat. Length of river is 5.50 km
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1.4 (a) Full Course of Waterway
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1.4 (b) Course of Waterway under study.
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1.5 Scope of Works. The Scope of the work is to conduct detailed
hydrographic and topographic survey of 5.5 km length of the river from Ganga
confluence at Assi Ghat (Lat 25°17'18.64"N, Long 83° 0'25.46"E) to Newada (Lat
25°16'37.28"N, Long 82°58'17.60"E).
The Scope of work for the conduct of survey of Assi River includes.
Undertake Bathymetric and topographic survey of National waterway.
Establishing horizontal and vertical control station.
Construction of bench mark pillars and establishing its reduced level w.r.t
to MSL
Setting up deployment of water level gauges.
Current velocity and discharge measurements
Collection and analysis of water and bottom sample
A collection of topographic features including existing cross structure
Preparation of inventory of industries in the project influence area(PIA)
Analysis of survey data, including assessment of water availability for
navigation
Preparation of survey charts and detailed hydrographic survey report.
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SECTION – 2: METHODOLOGY ADOPTED TO UNDERTAKE STUDY
2.1 Methodology. The detailed topographic survey of Assi River from
Ganga Confluence (Ch. 0 km) at Assi Ghat to Newada (Ch. 5.5 km) was carried out
by dedicated topographic team with highest degree of professionalism, enthusiasm
and quality from03rd Dec 2015 to 30th Dec 2015. Descriptive report is being rendered
as annexure along with this report.
2.1(a) Personnel and Resources. Total 32 personnel were involved which
includes Party Chief, Sr. Surveyors, surveyors, helpers, cooks and drivers for the
task in addition to resources viz. vehicles, logistics, etc. which are tabulated below.
2.1(b). Equipment Used. Various equipment’s were used during the survey
operations which is tabulated below as well as elaborately described in the
succeeding paragraphs.
TOPOGRAPHIC SURVEY EQUIPMENTS
Equipment Make Qty. Deployed
GPS Sets Trimble Spectra 5
Auto Level Leica 2
Total Station Topcon 1
Total Station Leica 1
Software Autocad 1
Software Trimble Spectra Survey office v.8 1
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2.1(c) Topographic Survey. The Topographic survey was carried out between
03rd Dec 2015 to 30th Dec 2015. The weather was cold and fog, for most of the
survey period. The survey was undertaken as per the approved line provided by
IWAI. The spot level points in the crossline were spaced at 3m m interval. The
plotting of the chart was done on UTM Projection at Zone 44N. The spot levels along
the river banks and dry river beds were obtained by using Trimble DGPS in RTK
mode. The topographic survey for the entire survey stretch was conducted to collect
the following data:-
Spot levels of the River bed and Banks
Delineation of Islands
Fixing of bridges and marks
Assess the type of river bank
Extending the vertical and horizontal control throughout the survey
area
Collection of local information along the river Banks
Topographic Spot Levelling by Total Station Leica
The details of all spot levels are provided in the respective sheets being presented
along with this report. The details of bank protection and features across the river are
Placed at Annexure 5 & 6 respectively. Additionally, a soft copy of the same in XYZ
format is being handed over as deliverable data.
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2.1(d). Calibration The equipment used for survey was calibrated by the equipment
supplier. The equipment calibration certificates are placed at Annexure 13 to this
report.
2.2 Description of Bench Mark. Trimble Spectra Precision GPS system was used
in standalone static observation mode for 24 hrs. at Ishan Tower Hotel Building
rooftop (Approx. 300m distance from Madruadih Railway Station at Varanasi U.P)
which is also denoted as Base at roof top (Control Point). Extension of the geodetic
control was achieved by setting up BM Pillars throughout the river stretches at 0.5
and 5.5 km chainage approximately. Co-ordinates of these two pillars were
established by simultaneous static observations between established and new
stations. The data was processed by using Spectra Precision Survey Office
software.
Two Tide pole was erected in Assi River as bathymetric survey was not carried out
throughout stretch. Minimum levels at confluence and Indira Nagar Colony, Newada
were considered for establishing Sounding Datum and in between datum of each km
were calculated by interpolation method.
The vertical control was set up by transferring the value of BM provided by CWC
gauge station at Rajghat (Value of CWC BM 73.149), Varanasi. Simultaneous GPS
observations were carried out with the help of Trimble Spectra Precision Positioning
System on Assi TBM (near CWC BM) and Base. CWC BM was connected to the
Assi TBM using Auto Level (Levelling Calculations are given in Annexure 10). After
discussion with the IWAI authorities, sounding datum were established for the total
river length.
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CWC BENCHMARK AT RAJGHAT
2.3 Tidal Influence Zone and Tidal Variation. Total 5.5 km length of river stretch
was completely non-tidal. Only topographic survey was carried out in this river
stretch. No tidal observation was carried out.
2.4 Methodology to Fix Sounding Datum. Ganga Confluence Sounding Datum
was provided by IWAI. LAD being considered to calculate Sounding Datum of the
whole river stretch.
2.5 Maximum and Minimum Water Level. There is no CWC Gauge located in Assi
River stretch.
2.6 Salient Features of Dam, Barrages, Weirs, Anicut, Locks and Aqueducts,
etc. There is no dam, barrage, weir, anicut, lock and aqueduct was noticed in this
river.
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2.7 Description of Erected Bench Mark Pillars. New Bench Mark Pillar (02 Nos)
were constructed as per the Specification of Tender Documents. The Extension of
Horizontal and Vertical Control was carry out by base line processing with the
nearest reference station. Details of erected BM pillars is Place at Annexure 9.The
final accepted co-ordinate and Reference Level value of Assi BM Pillar are as
below:-
CONTROL PILLERS COORDINATES
BM
NO
Location Chainage
(km) Latitude Longitude
Northing
(m) Easting (m)
Value of
Sounding
Datum
BM
height
above
MSL (m)
BM
height
above
SD (m)
BASE ASSI
Roof top Varanasi - 25°17'40.976"N 82°58'25.0755"E 698706.071 2799044.505
- 95.658
-
AR-P1 Assi River confluenc
e 0.50 25°17'6.85"N 83° 0'29.59"E 2798046.041 702205.106
59.50 69.300
9.8
AR-P2 Indira Nagar Colony
5.50 25°16'33.38"N 82°58'16.69"E 2796961.967 698502.650 76.00
78.180 2.18
2.8 Description of Erected Tide Gauges. Tide gauges were erected
throughout the river stretch. Water level reading as per prescribed format along with
chainage is mentioned at Annexure 3. The Detail of erected tide pole which are
used for reduction of Sounding is as follows.
Tide Gauge No
Location Chainage
(km) Easting/Northing
(m)
Zero of Tide Gauge W.r.t
MSL (m)
Period of Observation
TP1 Sunder pur 4.03 699629.966E
2797466.714N 72.268
During the Conduct of Topographic
Survey
TP2 Indra Nagar
Colony 5.00
698814.010E 2797253.612N
75.688 During the Conduct
of Topographic Survey
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2.9 Chart Datum/ Sounding Datum and Reduction Details. Sounding Datum
reduction table is appended below:-
SOUNDING DATUM FOR EACH KM
SL No. Location Chainage
(km)
Established Sounding
Datum w.r.t. MSL (m) at col.
A.
Stretch for corrected soundings and topo levels
(km)
Sounding Datum w.r.t
MSL (m)
Correction in WL data
for Bathymetric survey (m)
Topo level data
converted as depth
for volume calculation wrt SD (m)
HFL wrt MSL (m)
(A) (B) (C) (D)
(E ) (F= E-
WL data in MSL)
(G= E- topo
levels in
MSL) From To
1 SD at Ganga Conf.
0 58.038 70.05
2 AR_P1 0.5 0 1 59.5
Details at Annexure 3
A separate xyz file is
created and Soft copy Provided
with report
71.51
3 1 1 2 62.8 74.81
4 2 2 3 66.1 78.11
5 3 3 4 69.4 81.41
6 4 4 5 72.7 84.71
7 AR_P2 5 5 5.5 76 88.01
2.10 HFL at Gauge Stations and Cross-Structures. This river is struggling
for its existence and converted to a nala.2 No’s Tide gauges were installed but
bathymetric survey was not conducted. Sounding Datum at cross structures are
tabulated below:-
Sl Cross-Structure
Details Chainage (km)
Established HFL /MHWS/FSL/MWL/FRL w.r.t
MSL (m)
Computed HFL /MHWS at Cross – Structure wrt MSL
(m)
1 Ganga Confl.
0.0
70.050
2 Culvert 1.44 - 76.262
3 Culvert 1.62 - 76.856
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2.11Graph: Sounding Datum and HFL vs Chainage.
CHAINAGE (KM) SOUNDING DATUM (M) HFL/ MHWS
(M)
0 58.04 70.05
0.5 59.5 71.51
1 62.8 74.81
2 66.1 78.11
3 69.4 81.41
4 72.7 84.71
5.5 76 88.01
2.12 Average Bed Slope. Average bed slope of the whole river stretch being
tabulated below:-
Chainage (KM)
River Bed Level wrt
MSL (M)
River Bed Level Change
(m) (A)
Distance (B)
Slope (A/B)
From To From To (m) (km)
Ch. 0 km Ch. 1 km 61.56m 69.21m 7.65 1 1:131
Ch. 1km Ch. 2 69.21m 70.859m 1.649 1 1:606
0 0.5 1 2 3 4 5.5
Sounding Datum 58.04 59.5 62.8 66.1 69.4 72.7 76
HFL 70.05 71.51 74.81 78.11 81.41 84.71 88.01
0
10
20
30
40
50
60
70
80
90
100
Leve
ls M
SL
Axis Title
Sounding Datum and HFL vs Chainage
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Chainage (KM)
River Bed Level wrt
MSL (M)
River Bed Level Change
(m) (A)
Distance (B)
Slope (A/B)
Ch. 2 km Ch. 3 km 70.859 m 70.956 m 0.097 1 1:1031
Ch. 3 km Ch. 4 km 70.956 m 72.563m 1.607 1 1:622
Ch. 4 km Ch.5 km 72.563m 75.342m 2.779 1 1:360
Ch.5 km Ch.5.5 km 75.342m 75.869 m 0.527 0.5 1:949
2.13 Details of Dam, Barrages, Weirs, Anicut, etc. There is no dam,
barrage, weirs or anicut in this river.
2.14 Details of Locks. No lock exists in this river stretch.
2.15 Details of Aqueducts. There is no aqueduct in this portion of the river.
0 1 2 3 4 5
RIVER BED LEVEL 61.56 69.21 70.859 70.956 72.563 75.342
60 62 64 66 68 70 72 74 76 78 80
Leve
ls M
SL
Chainage(KM)
RIVER BED LEVEL VS CHAINAGE GRAPH
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2.16 Details of Existing Bridges & Crossings. There is no bridge exist in this
river. However, two culverts are present in this stretch and there is no HT line exists
in this portion. Details are mentioned below:-
Sl
No
Str
uctu
re N
am
e
Ch
ain
ag
e (
km
)
Position (Lat Long) Position (UTM)
L
en
gth
(m
)
Wid
th (
m)
No
of
Pie
rs
Ho
rizo
nta
l
cle
ara
nc
e
(Dis
tan
ce
Betw
een
pie
rs)
(m)
Vert
ical cle
ara
nc
e
wrt
HF
L (
m L
evel
Rem
ark
s
(Co
mp
lete
d o
r
no
t-co
mp
lete
d)
Left Bank Right Bank Left Bank Right Bank
1 Culvert 1.44 25°17'7.10"N 83° 0'8.72"E
25°17'7.75"N 83° 0'8.45"E
701621.467E 2798045.998N
701613.960E 2798065.628N
24.5 15.1 - 20 2.2 Completed
2 Culvert 1.62 25°17'6.14"N 83° 0'2.38"E
25°17'6.14"N 83° 0'2.38"E
701444.405E 2798013.388N
701444.405E 2798013.388N
24 7.6 2 5.5 -2.6
Completed
Culvert at Ch. 1.40 km &Ch. 1.60 km
2.17 Details of Other Cross Structures. There is no other cross structure,
pipe-line and underwater cable present in this river stretch.
2.18 High Tension Lines / Electric Lines / Tele-Communication Lines. No HT
line is present in this river portion.
2.19 Current Meter and Discharge Details. Current meter observation was not
carried out as the deployment was not feasible in the Assi Nala.
2.20(a) Soil Sample & Water Sample. No soil and water samples were
collected from the Assi Nala.
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SECTION-3
3. Description of Waterway
3.1 Stretch 1: From Ch 0 km to Ch 5.50 km. This stretch of the river is having
length of 5.5 km and average width of 5m to 10m. The river has been converted to a
nala. The most of the waste or sewage of the city being disposed into the river. The
river being diverted to Nagwa nala from Ravidas Park to protect Assi ghat.
Topographic survey was carried out for both earlier Assi river (provided by the client)
and present flow at Nagwa nala.
From Ch 0 km to Ch 5.50 km
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Dredging quantity for substretch-1
Chainage
(km) Observed Reduced wrt Sounding Datum
Type From To Min
Depth (m)
Max Depth
(m)
Length of
Shoal (m)
Dredging Qty (cu.m)
Min Depth
(m)
Max Depth
(m)
Length of Shoal
(m)
Dredging Qty (cu.m)
Class-I 0 5.5 0 1.0 5,500 1,82,361.75 -0.3 0.9 5,500 2,10,793.05
Class-II 0 5.5 0 1.0 5,500
2,63,982.81 -0.3 0.9 5,500
2,86,908.88
Class-III 0 5.5 0 1.0 5,500 3,76,236.75 -0.3 0.9 5,500 3,86,322.36
Class-IV 0 5.5 0 1.0 5,500 4,39,950.43 -0.3 0.9 5,500 4,50,280.25
(a) Bathymetry Survey & Topographic Survey
SUB-STRETCH-1 (0-4.95 KM)
Type of Survey Chainage (km) Remarks
Bathymetry Survey
No bathymetric survey
Topographic Survey
0.0 km to 5.50 km Being Dry/Very Shallow covered by topographic method
0.0 km to 5.50 km Riverbank, prominent features along the bank.
(b) Observed & Reduced Bed Profile of the Stretch. Both observed
and reduced bed profile being depicted below:-
0 0.5 1.5 2.5 3.5 4.5 5.5
Observed 1.1 0.84 0.3 0.3 0.12 0.78 0.3
Reduced 0.5 0.3 -0.3 -0.2 -0.3 0.31 -0.3
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
RIV
ER B
ED P
RO
FILE
(M
)
CHAINAGE (KM)
OBSERVED & REDUCED DEPTH 0-5.50 KM
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.
Chainage (km) River Bed Level (m) River Bed Level
Change (m) Slope
From To From To
0.0 5.50 61.560 75.869 14.309 1:384
(c) Prominent Dam/ Barrage. There is no barrage or dam exists in this
section.
(d) Tidal Stretch. This 5.5 km of river stretch is completely non-tidal.
(e) Conditions of Bank. Bank of Assi Nala is either concrete or pitch
protected in many places as the total 5.5 km river is passing through the
Varanasi city area.
(f) Hindrances. The Assi is now converted to a nala which is carrying the
wastage and drainage of the Varanasi city to Ganga. The river is very narrow
and shallow due to which it is not suitable for the navigable channel. At some
places, the width of the river is up to 2 or 3 metres only. At the Ch. 5 km and
above the width of the river has been remarkably reduced. The mouth of the
river as per the chainage provided by the client does not exist due to the
illegal construction and encroachments. The water flow being diverted at
Ravidas Park to the concrete Nagwanala.
(g) Encroachment. Encroachment on the river bank is prominent on
numerous ocassions and the same has been covered in the previous
paragraphs.
(h) Protected Area. There is no wildlife, Defence, Atomic power plant
and any other procted areas in this stretch.
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(i) NH/ SH. NH 7, NH 29, NH 56, NH 73 and SH 36 are located around the
river strech.
(j) Railway Station. Railway stations in this stretch are Varanasi Jn,
Sarnath Jn, Manduadih, Kashi and Mughalsarai station.
(k) Land Use Pattern. As the river passes through the Varanasi city, the
most of the land along the river is utilised for residential purpose only.
(l) Crops. Assi Nala is passing through the congested residential areas of
Varanasi city. There is neither any crop nor any cultivation activity observed
along the stretch.
(m) Bulk Construction Material. There is neither any factory for
construction material nor any raw material available along the corridor of the
river stretch.
(n) Existing Industry. Major industries are silk, handloom. Handicrafts,
Carpet, BHEL, Diesel Locomotive Works, Banarasi Saree, Brassware,
Copperware, Wooden& Clay toys and Musical Instruments, etc.
(o) Existing Ghats, Jetties and Terminals. There is neither any jetty nor
any ferry ghat was observed in the waterway. The Assi ghat is located at the
Ch. 0.0 km. Small wooden/ fibre boats are being utilised for the tourists.
(p) Cargo Movement. There is no cargo movement observed in this
portion of the water way during the course of survey.
(q) Prominent City/ town or Place of Worship. The river passes
through the city Varanasi. Varanasi is growing as an important industrial
centre, famous for its muslin and silk fabrics, perfumes, ivory works, and
sculpture. The city's religious importance continued to grow in the 8th century,
when AdiShankara established the worship of Shiva as an official sect of
Varanasi. Tulsidas wrote his epic poem on Rama's life called Ram
CharitManas in Varanasi.
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Varanasi has been a cultural centre of North India for several thousand years,
and is closely associated with the Ganges. Hindus believe that death in the
city will bring salvation, making it a major centre for pilgrimage. The city is
known worldwide for its many ghats, embankments made in steps of stone
slabs along the river bank where pilgrims perform ritual ablutions.
T
e
m
p
l
e
S
Dashashwamedh Ghat & Kashi Vishwanath Temple
Sarnath Temple & Sankatmochan Temple
(r) Ferry Services: No ferry service is served at the Assi River.
(s) Water Sports Recreational Facilities. There is no facility available
for water sports along the river stretch. However at Ganga confluence, water
sport facility may be developed in future.
(t) Fishing Activity. No fishing activity was observed in the Assi Nala.
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(u) Sand Mining. No sand mining activity was found in this stretch.
(v) Tributaries. There is no tributary is present in this portion.
(w) Details of Irrigational Canals. There is no irrigational canal present
in this section.
(x) Details of Nalas. This surveyed river portion is a nala by itself and
there is no other nala present in this portion. Water flowing through it is mostly
polluted and sanitary water.
(y) Usage of Water. Discharged sewage water of this river cannot be
utilised untreated.
(z) Details of Cross-Structures. There is no bridge exist in this river.
However, two culverts are present in this stretch and there is no HT line exists
in this portion. Details are mentioned below:-
Sl
No
Str
uctu
r
e N
am
e
Ch
ain
ag
e (
km
)
Position (Lat Long) Position (UTM)
L
en
gth
(m
)
Wid
th
(m) No
of
Pie
rs
Horizontal clearance (Distance Between piers) (m)
Vertical clearance wrt HFL
Left Bank Right Bank Left Bank Right Bank
1 Culvert 1.44 25°17'7.10"N 83° 0'8.72"E
25°17'7.75"N 83° 0'8.45"E
701621.467E 2798045.998N
701613.960E 2798065.628N
24.5 15.1 - 20 2.2
2 Culvert 1.62 25°17'6.14"N 83° 0'2.38"E
25°17'6.14"N 83° 0'2.38"E
701444.405E 2798013.388N
701444.405E 2798013.388N
24 7.6 2 18.5 -2.6
Culvert at Ch. 1.44 km &Ch. 1.62 km
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SECTION – 4
4.1 Terminals. There is no terminal exist in this surveyed river stretch.
Development of terminal being not recommended for this river stretch due to steep
gradient.
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SECTION – 5
5.1 Fairway Development. The dredging channel is designed by linking
deepest sounding of each cross sections and the dredging quantity is estimated for
developing a navigable channel with the following dimension. The best suitable
dredging channel class for the survey stretch of Assi River is identified as Class-I
and the dredge volume for the Class I to Class-IV were also calculated for the entire
survey stretch. The details of Fairway channel dimension used for the dredging
calculation are as follows:-
Class of Channel Depth (m) Bottom
Depth (m) Bottom width
(m) Top Width
(m) Slope
Class -I 1.2 30 42 1:5
Class -II 1.4 40 54 1:5
Class -III 1.7 50 67 1:5
Class -IV 2 50 70 1:5
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5.2 Calculation of Dredging Quantity The dredge volume calculations were
accomplished using the HYPACK dredge volume computation utility. For clarity and
ease of calculations, the complete channel profile was divided into segments of 1 km
each (enclosed at Annexure-2). The Tin v/s Channel volume with Hypack Standard
algorithm was used to calculate the dredge volume. The stretch wise summary of the
dredge volume for a different class of fairway is as follows:-
1) 30m x 1.2m with side slope 1:5, along the deepest route.
CLASS - I
Chainage (km) Observed Reduced w.r.t Sounding Datum
From To Min.
Depth (m)
Max. Depth
(m)
Length of
Shoal (m)
Dredging Qty (Cu.m)
Cumulative Drg. Qty.
(cu.m)
Min. Depth
(m)
Max. Depth
(m)
Length of
Shoal (m)
Dredging Qty (Cu.m)
Cumulative Drg. Qty.
(cu.m)
Assi Ghat Ch. 0 Km
Newada Ch. 5.5
km 0 1.1 5,500 1,82,361.75 1,82,361.75 -0.3 0.9 5,500 2,10,793.05 2,10,793.05
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2) 40m x 1.4m with side slope 1:5, along the deepest route.
CLASS - II
Chainage (km) Observed Reduced w.r.t Sounding Datum
From To Min.
Depth (m)
Max. Depth
(m)
Length of
Shoal (m)
Dredging Qty (Cu.m)
Cumulative Drg. Qty.
(cu.m)
Min. Depth
(m)
Max. Depth
(m)
Length of
Shoal (m)
Dredging Qty (Cu.m)
Cumulative Drg. Qty.
(cu.m)
Assi Ghat Ch
0 Km
Newada Ch. 5.5
km 0 1.1 5,500 2,63,982.81 2,63,982.81 -0.3 0.9 5,500 2,86,908.88 2,86,908.88
3) 50m x 1.7m with side slope 1:5, along the deepest route.
CLASS - III
Chainage (km) Observed Reduced w.r.t Sounding Datum
From To Min.
Depth (m)
Max. Depth
(m)
Length of
Shoal (m)
Dredging Qty (Cu.m)
Cumulative Drg. Qty.
(cu.m)
Min. Depth
(m)
Max. Depth
(m)
Length of
Shoal (m)
Dredging Qty (Cu.m)
Cumulative Drg. Qty.
(cu.m)
Assi Ghat Ch.0 Km
Newada Ch. 5.5
km 0 1.1 5,500 3,76,236.75 3,76,236.75 -0.3 0.9 5,500 3,86,322.36 3,86,322.36
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4) 50m x 2.0m with side slope 1:5, along the deepest route.
CLASS - IV
Chainage (km) Observed Reduced w.r.t Sounding Datum
From To Min.
Depth (m)
Max. Depth
(m)
Length of
Shoal (m)
Dredging Qty (Cu.m)
Cumulative Drg. Qty.
(cu.m)
Min. Depth
(m)
Max. Depth
(m)
Length of
Shoal (m)
Dredging Qty (Cu.m)
Cumulative Drg. Qty.
(cu.m)
Assi Ghat Ch. 0 Km
Newada Ch. 5.5
km 0 1.1 5,500 4,39,950.43 4,39,950.43 -0.3 0.9 5,500 4,50,280.25 4,50,280.25
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SECTION – 6
6.1 Conclusion. The river corridor consists of a length of 5.5 km from Assi Ghat, at
Ganga confluence (Ch. 0 km) to Newada, Varanasi (Ch.5.5 km). The whole river is non-tidal
and is one of the minor tributary of Ganga. Sounding operation was not feasible in the whole
river stretch for shallow depth and narrow width. Topographic survey was carried out from
Ch. 0 km to Ch.5.5 km. Total length of the waterway is having considerably steep gradient.
Assi river neither being utilized for ferry service nor cargo movements. There is no bridge
present in the river portion. However, two culverts are present in the water way which are
presently in use. The dredging on the Waterway of Assi River will improve the depth of
the channel for any navigational requirement. The river banks are well connected
with the road as well as rail networks.
Total river length i.e. 5.5 km is having depth below 1.2m. There is no barrage, dam, weir,
anicut, lock and aqueduct exists in the surveyed river stretch. Two culverts are present in the
water way and range of Horizontal & Vertical Clearances are 5.5m to 20m and -2.6m to 2.2
m respectively. Vertical Clearances being considered wrt HFL. No power cable being
crossing the entire river stretch.
There is neither any protected area (Atomic/ Port/ Wildlife/ Research) nor any
hindrance exist in the whole waterway. Source of Assi Nala is mainly from the
sewage water from the local residential area. There is no cargo, passenger ferry and
tourism facility is available in the river stretch. Land along the river is mainly utilized
for residential purpose. The whole river stretch is well connected with the rail and
road networks within 2 to 3 Km. The only prominent city i.e. Varanasi is located
along the river stretch.
No ferry service is available in the water way. Varanasi has been a cultural centre of
North India for several thousand years, and is closely associated with the Ganges.
Hindus believe that death in the city will bring salvation, making it a major centre for
pilgrimage. The city is known worldwide for its many Ghats, embankments made in
steps of stone slabs along the river bank where pilgrims perform ritual ablutions.
Important places of mythological as well as historical values are Kashi Vishwanath
Temple, Dasaswamedh Ghat, Sarnath, Assi Ghat, New Vishwanath Temple at BHU
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Complex and Sankat Mochan Hanuman Temple, etc. Heavy tourist influx was
observed at Varanasi city due to its mythological and historical importance. Varanasi
is the only city present along the water way.
There is no terminal present in this waterway. Development of terminal being not
recommended due to very steep gradient as well narrow width of the river corridor.
Moreover, the river is passing through the dense residential areas.
The feasibility survey were carried out at river Assi River (length 5.5 km) from Assi
Ghat, at Ganga confluence (Ch. 0 km) to Newada, Varanasi (Ch. 5.5 km). The
Dredging quantity being tabulated below: -
Drg. Qty. (cu.m)
Class I 2,10,793.05
Class II 2,86,908.88
Class III 3,86,322.36
Class IV 4,50,280.25
Average width of the whole river corridor is 5m – 10m. Steep gradient was observed
in the Assi Nala (1:384). Huge residential buildings/ structures were observed
throughout the water way. Hence, development of navigational channel for this water
way seems to be non-viable.
Consultant Recommendation
The Assi is nala passing through the city carrying the waste.
The average width of the Assi River is 5.50 m, due to which it cannot be
viable for any type of navigation.